DNS/watch/8.8.8.8/togetterについて、ここに記述してください。

8.8.8.8 の毒が消えた。-- ToshinoriMaeno 2011-07-07 22:38:10

%dig any togetter.com @8.8.8.8 

; <<>> DiG 9.6.2-P2 <<>> any togetter.com @8.8.8.8
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 40818
;; flags: qr rd ra; QUERY: 1, ANSWER: 8, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;togetter.com.                  IN      ANY

;; ANSWER SECTION:
togetter.com.           86400   IN      NS      ns-93.awsdns-11.com.
togetter.com.           86400   IN      NS      ns-657.awsdns-18.net.
togetter.com.           86400   IN      NS      ns-1461.awsdns-54.org.
togetter.com.           86400   IN      NS      ns-1828.awsdns-36.co.uk.
togetter.com.           900     IN      SOA     ns-1461.awsdns-54.org. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
togetter.com.           60      IN      A       46.51.250.145
togetter.com.           600     IN      TXT     "v=spf1 +a +mx +include:gmail.com ~all"
togetter.com.           600     IN      TXT     "google-site-verification=SI0ODkRbg4-YeTmDnwJlfSgCM4Alg1rxkfafZzqzvhI"

;; Query time: 136 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Fri Jul  8 07:35:52 2011
;; MSG SIZE  rcvd: 374

8.8.8.8 には キャッシュサーバとして問い合わせるべきだった。

$ DNSCACHEIP=8.8.8.8 dnsqr any togetter.com 

255 togetter.com:
184 bytes, 1+4+0+0 records, response, noerror
query: 255 togetter.com
answer: togetter.com 473 CNAME togetter-outer-1482106848.ap-northeast-1.elb.amazonaws.com
answer: togetter-outer-1482106848.ap-northeast-1.elb.amazonaws.com 60 SOA ns-944.amazon.com root.amazon.com 1310025024 3600 900 7776000 60
answer: togetter-outer-1482106848.ap-northeast-1.elb.amazonaws.com 600 NS ns-944.amazon.com
answer: togetter-outer-1482106848.ap-northeast-1.elb.amazonaws.com 60 A 46.51.250.145

$ DNSCACHEIP=8.8.8.8 dnsqr ns togetter.com 

2 togetter.com:
127 bytes, 1+2+0+0 records, response, noerror
query: 2 togetter.com
answer: togetter.com 1783 CNAME togetter-outer-1482106848.ap-northeast-1.elb.amazonaws.com
answer: togetter-outer-1482106848.ap-northeast-1.elb.amazonaws.com 70 NS ns-925.amazon.com

NSレコードは教えてくれない。　（CNAMEを優先するらしい）

CNAMEのTTL の変わり方が変 (ほぼ休みなく問い合わせた）

以下は8.8.8.8 がコンテンツサーバだとしての問い合わせなので、答が変でもしかたないのかも。

$ dnsq a togetter.com 8.8.8.8 

1 togetter.com:
115 bytes, 1+2+0+0 records, response, weird ra, noerror
query: 1 togetter.com
answer: togetter.com 1757 CNAME togetter-outer-1482106848.ap-northeast-1.elb.amazonaws.com
answer: togetter-outer-1482106848.ap-northeast-1.elb.amazonaws.com 17 A 46.51.250.145

tmaeno@:~$ dnsq any togetter.com 8.8.8.8 

255 togetter.com:
30 bytes, 1+0+0+0 records, response, weird ra, noerror
query: 255 togetter.com

tmaeno@:~$ dnsq a togetter.com 8.8.8.8 

1 togetter.com:
115 bytes, 1+2+0+0 records, response, weird ra, noerror
query: 1 togetter.com
answer: togetter.com 1744 CNAME togetter-outer-1482106848.ap-northeast-1.elb.amazonaws.com
answer: togetter-outer-1482106848.ap-northeast-1.elb.amazonaws.com 4 A 46.51.250.145

tmaeno@:~$ dnsq ns togetter.com 8.8.8.8 

2 togetter.com:
30 bytes, 1+0+0+0 records, response, weird ra, noerror
query: 2 togetter.com

tmaeno@:~$ dnsq a togetter.com 8.8.8.8 

1 togetter.com:
115 bytes, 1+2+0+0 records, response, weird ra, noerror
query: 1 togetter.com
answer: togetter.com 1208 CNAME togetter-outer-1482106848.ap-northeast-1.elb.amazonaws.com
answer: togetter-outer-1482106848.ap-northeast-1.elb.amazonaws.com 56 A 46.51.250.145